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<html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><!--Converted with jLaTeX2HTML 2002 (1.62) JA patch-1.4patched version by: Kenshi Muto, Debian Project.LaTeX2HTML 2002 (1.62),original version by: Nikos Drakos, CBLU, University of Leeds* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan* with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --><HTML><HEAD><TITLE>4. The Class Simulator</TITLE><META NAME="description" CONTENT="4. The Class Simulator"><META NAME="keywords" CONTENT="everything"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META NAME="Generator" CONTENT="jLaTeX2HTML v2002 JA patch-1.4"><META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"><LINK REL="STYLESHEET" HREF="everything.css" tppabs="http://www.isi.edu/nsnam/ns/doc/everything.css"><LINK REL="next" HREF="node39.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node39.html"><LINK REL="previous" HREF="node29.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node29.html"><LINK REL="up" HREF="node29.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node29.html"><LINK REL="next" HREF="node31.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node31.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html1774" HREF="node31.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node31.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html1768" HREF="node29.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node29.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html1762" HREF="node29.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node29.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html1770" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html"><IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="file:/usr/share/latex2html/icons/contents.png"></A> <A NAME="tex2html1772" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html"><IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="file:/usr/share/latex2html/icons/index.png"></A> <BR><B> Next:</B> <A NAME="tex2html1775" HREF="node31.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node31.html">4.1 Simulator Initialization</A><B> Up:</B> <A NAME="tex2html1769" HREF="node29.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node29.html">2 Simulator Basics</A><B> Previous:</B> <A NAME="tex2html1763" HREF="node29.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node29.html">2 Simulator Basics</A>   <B> <A NAME="tex2html1771" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html1773" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H1><A NAME="SECTION03100000000000000000"></A><A NAME="chap:sim"></A><BR>4. The Class Simulator</H1><P>The overall simulator is described by a TclSimulator../ns-2/ns-lib.h.It provides a set of interfaces for configuring a simulationand for choosing the type of event scheduler used to drivethe simulation.A simulation script generally begins by creating an instanceof this class and calling various methods to create nodes, topologies,and configure other aspects of the simulation.A subclass of Simulator called <TT>OldSim</TT> is used to support v1 backward compatibility.<P>The procedures and functions described in this chapter can be found intcl/lib/ns-lib.tcl, scheduler.{cc,h}, and, heap.h.<P><BR><HR><!--Table of Child-Links--><A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A><UL><LI><A NAME="tex2html1776" HREF="node31.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node31.html">4.1 Simulator Initialization</A><LI><A NAME="tex2html1777" HREF="node32.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node32.html">4.2 Schedulers and Events</A><UL><LI><A NAME="tex2html1778" HREF="node33.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node33.html">4.2.1 The List Scheduler</A><LI><A NAME="tex2html1779" HREF="node34.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node34.html">4.2.2 the heap scheduler</A><LI><A NAME="tex2html1780" HREF="node35.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node35.html">4.2.3 The Calendar Queue Scheduler</A><LI><A NAME="tex2html1781" HREF="node36.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node36.html">4.2.4 The Real-Time Scheduler</A><LI><A NAME="tex2html1782" HREF="node37.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node37.html">4.2.5 Precision of the scheduler clock used in ns</A></UL><BR><LI><A NAME="tex2html1783" HREF="node38.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node38.html">4.3 Other Methods</A></UL><!--End of Table of Child-Links--><BR><HR><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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